Variable-speed gear



" F. AHOND.

VARIABLE SPEED GEAR. APPL|cAT|oN-r|LED OCT. 16. 1919.

.El ,$370,080. Patented Mar. 1, 1921.

2 SHEETS-SHEET l- Fig Figi@ Figl F. AHOND.

VARIABLE SPEED GEAR.

APPLICATION FILED ocr. I6. 1919.

' 1,370,080, Patented Mar. 1,1921;

2 SHEETS-SHEET 2- F1 g. 5 Fig. 6

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FLIX AHOND, OF PARIS, FRANCE.

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- specification of Letters Patent.

4Application filed 0ctober`16, 1919. Serial No. 331,170.

To all whom 'it may concern p Be it known that l, FLIX AHoND, citizen of the Re ublic ofl France, residing at 5 Boulevard rnano, Paris, Seine, in the Republic of France, have invented new and useful improvements in Variable-Speed Gears, of which the following is a specification.

rlhe present invention consists in the use of one or more planetary rollers held in a supporting .frame which is rotated by the source of motive power, the axis of the planetary rollers bein simply obliged to remain in a plane passing through the axis of the supporting frame. Under the action of centrifugal or centripetal force, the planetary rollers come in contact by means of -their surfaces-d1 and d2 with two crown pieces, one of which, D1, vis fixed, while the second, D2, is movable about the axis of rotation of the supporting frame (Fig. 1.)

According to the relation which exists between the respective contactdiameters d1 d2 D1 D2 of the rollers and the crown pieces,

lthe rotation of the frame carrying these rollers causes the crown pieces D2 to rotate inthe saine or in contrary sense.

By varying any one 0f the diameters D1 D2 d1 d2, or several of these at the same time,

the. crown piece D2is given a rotary movement at various speeds according to the case,

. and may be brought to al standstill for certain respective values of said diameters. The annexed drawing shows by way of example several forms of the apparatus.'

v In said drawing:

Figure 1 shows in longitudinal section 4a device constructed in accordance with the invention; 'Figl la frame;

Figs. 2, 3, 4, 5 and 6 show modifications is an end view of the supporting of the apparatus according to the invention;

'contact can be obtained in divers ways,

Fig. 7 shows another modification to@ gether with direct drive.

The variation of the diameter of rolling either by designing the rollers and crown pieces in conical shape with straight or)` curved generatrices, in which case the relative displacement of the parts along the axis causes the modication'of Athe diameters' of rolling contact (Fig. 2), or by increasing or ldiminishing the diameter of the crown pieces by the use of various concentric clamping andunclamping devices after the manner of the chucks employed on machine l tools (Fig. 3), or by the stoppage of one of the crown pieces in a series D1 containing several crown pieces disposed in line (F ig. 4), (in this case the rollers or crowns can be provided with gear teeth), or again, by any other suitable means such as increase or diminution of the diameters of rolling contact by the action of fluids under pressure (Fig. 5).

ln all cases in which the two diameters in contact are invariable, the simple rolling contact can be replaced by gear teeth which will act, to prevent any possible slipping, and this no longer requires the action of centrifugal force in order to maintain the contact (Figa 6). l

The method shown in Fig. 7 is characterized by the use of a speed variation v caused by the longitudinal displacement of the crown piece D2, together with a design which allows of automatically separating the planetary rollers from the crown piece D1, especially in the case where theposition of the crown piece D2 causes its speed to equal the speed of the supporting frame. In this position, a set of tenons mounted on the supporting frame is made to enter corresponding openings in 'the crown piece D2, and the coupling is now made in a direct manner; the action of the rollers is here suppressed, and the driving shaft is connected directly with the operated shaft.

Having now described my invention what I claim as new and desire to secure byv Letters Patent is:

1. A lvariable speed gear comprising a driving shaft and a drivenshaft, planetaryv rollers having two rolling surfaces, a rotary supporting frame for lsaid rollers-v fixed to one of'theshafts and lhaving radial slots in which the shafts of the roller are slidably inountedfa fixed internally ared member ragainst which one of the rolling surfaces of radial slots in which the shafts of the'rollers said members Y receiving a conical shape y whereby the ratio of the diameters of rollare slidably mounted, all lined internally geared member 4,against which. one of the rollingsurfaces of 'Said rollers rolls, 'rotata- 5 ble internally geared member fixedv to. the

other shaft and against which the lother of; the rolling snrfaces'of said rollersvrollsytbe v ing tools for contact can be varied.

In testimony whereof I- have signed my namento this specification. A

FLIX AHOND. `l 

